问题
单项选择题
能从数据信号波形中提取同步信号的典型编码是（）
A.归零码
B.不归零码
C.定比码
D.曼彻斯特编码
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
能从数据信号波形中提取同步信号的典型编码是（）
A.归零码
B.不归零码
C.定比码
D.曼彻斯特编码
参考答案：D
If you often have a cold, headache or backache, there is something wrong with your health. Eating healthy food good for our health. .Tofu（豆腐）, milk, vegetables are healthy for us. Tofu is a kind of traditional（传统的） food. We often it in China. Now more and more people other countries think tofu is good for health, . They also like eating it. Milk is kind of health food. Every day you should one or two glasses of milk. It can us strong. Vegetables are very important. You should eat them. There are vitamin(维他命) A, B, C, D , E and so on in them. As we know, it’s important a balanced diet(均衡饮食). We must have the right kinds of food. We should also eat some pork, chicken and beef. We should eat more fruit and vegetables but less meat.
|